sPHENIX discussion of the superconducting solenoid

["Yip, Kin" <kinyip AT bnl.gov>]

Hopefully, this welding fix works.

 

Kin

 

From: Orfin, Paul <porfin AT bnl.gov>
Sent: Monday, February 28, 2022 2:28 PM
To: Yip, Kin <kinyip AT bnl.gov>
Subject: FW: sPHENIX - Valve seam leak repair

 

FYI, we welded a seam that was leaking and we are beginning to pump on it to do another leak check on it ahead of the ceramic breaks coming in on Wednesday. 

 

Thank you,

Paul Orfin
Cryogenic Systems, Collider-Accelerator Department
Brookhaven National Laboratory
Telephone: (631) 344-2899

 

From: Riker, Kenneth D <kenr AT bnl.gov>
Sent: Monday, February 28, 2022 2:13 PM
To: Decker, Kenneth <kdecker AT bnl.gov>; Orfin, Paul <porfin AT bnl.gov>; Weiss, Dan <weiss AT bnl.gov>
Cc: Warkentien, Andreas F <andyw AT bnl.gov>; Sardzinski, Mark A <sardzinski AT bnl.gov>; Sheth, Chintan <csheth AT bnl.gov>
Subject: Re: sPHENIX - Valve seam leak repair

 

All,

Weld cover pass is complete and the vacuum group has started the evacuation again in preparation for tomorrows leak check of the H3614A valve. 

 

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From: Decker, Kenneth <kdecker AT bnl.gov>
Sent: Monday, February 28, 2022 1:07:51 PM
To: Orfin, Paul <porfin AT bnl.gov>; Weiss, Dan <weiss AT bnl.gov>
Cc: Warkentien, Andreas F <andyw AT bnl.gov>; Sardzinski, Mark A <sardzinski AT bnl.gov>; Riker, Kenneth D <kenr AT bnl.gov>; Sheth, Chintan <csheth AT bnl.gov>
Subject: RE: sPHENIX - Valve seam leak repair

 

OK I will let our techs know and have everything ready for as soon as he is done we can pump with our station instead so we don’t have to swap pumps in the morning.

 

Ken Decker

C-AD Vacuum Group

Technical Supervisor

Brookhaven National Laboratory

Ph: 631 344 6079

 

From: Orfin, Paul <porfin AT bnl.gov>
Sent: Monday, February 28, 2022 1:06 PM
To: Decker, Kenneth <kdecker AT bnl.gov>; Weiss, Dan <weiss AT bnl.gov>
Cc: Warkentien, Andreas F <andyw AT bnl.gov>; Sardzinski, Mark A <sardzinski AT bnl.gov>; Riker, Kenneth D <kenr AT bnl.gov>; Sheth, Chintan <csheth AT bnl.gov>
Subject: RE: sPHENIX - Valve seam leak repair

 

Ken,

 

After lunch was when the welder would come back.  If 1:15 is the start time, I’d assume by 2:15 we can have the weld completed barring any unforeseen issues. 

 

Thank you,

Paul Orfin
Cryogenic Systems, Collider-Accelerator Department
Brookhaven National Laboratory
Telephone: (631) 344-2899

 

From: Decker, Kenneth <kdecker AT bnl.gov>
Sent: Monday, February 28, 2022 1:03 PM
To: Orfin, Paul <porfin AT bnl.gov>; Weiss, Dan <weiss AT bnl.gov>
Cc: Warkentien, Andreas F <andyw AT bnl.gov>; Sardzinski, Mark A <sardzinski AT bnl.gov>; Riker, Kenneth D <kenr AT bnl.gov>; Sheth, Chintan <csheth AT bnl.gov>
Subject: RE: sPHENIX - Valve seam leak repair

 

Paul,

 

What time is the welder going to be there?  If we get the turbos on asap we can leak check first thing in the AM

 

Ken Decker

C-AD Vacuum Group

Technical Supervisor

Brookhaven National Laboratory

Ph: 631 344 6079

 

From: Orfin, Paul <porfin AT bnl.gov>
Sent: Monday, February 28, 2022 12:37 PM
To: Weiss, Dan <weiss AT bnl.gov>; Decker, Kenneth <kdecker AT bnl.gov>
Cc: Warkentien, Andreas F <andyw AT bnl.gov>; Sardzinski, Mark A <sardzinski AT bnl.gov>; Riker, Kenneth D <kenr AT bnl.gov>; Sheth, Chintan <csheth AT bnl.gov>
Subject: sPHENIX - Valve seam leak repair

 

All,

 

After talking with the welder, he can potentially repair the suspect leak in the valve this afternoon.  If that is the case, I’d like to begin to pump down the lines again and potentially preform another vacuum leak check on that weld seam.  We will apply the roughing pumps to the lines once the welding is complete using an Argon purge for weld shielding gas.  The hope is that by tomorrow morning, the helium level will be low enough for a vacuum leak check again.  The replacement ceramic breaks come on Wednesday potentially so that would give us about 2 days to try a leak check before we cut out the ceramic breaks.    

 

If we are successful with completing the welding this afternoon, would we be able to put the turbos on these lines or should we wait till tomorrow morning?  Our weld meeting was at 11:30 so we just learned about the welder’s availability. 

 

Thank you,

Paul Orfin
Cryogenic Systems, Collider-Accelerator Department
Brookhaven National Laboratory
Building 1005S, MS 1005S, Room 217
Upton, NY 11973-5000
Telephone: (631) 344-2899
Fax: (631) 344-3329 
E-mail: porfin AT bnl.gov